Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2431-14-208/MediaObjects/12887_2014_Article_1136_Fig1_HTML.jpg)
Flow diagram showing population profile. RA = room air, MO = moderate oxygen concentration, HO = high oxygen concentration, PPV = positive pressure ventilation, CHD = congenital heart disease, TTN = transient tachypnea of newborn.
Flow diagram showing population profile. RA = room air, MO = moderate oxygen concentration, HO = high oxygen concentration, PPV = positive pressure ventilation, CHD = congenital heart disease, TTN = transient tachypnea of newborn.